FIELD: construction engineering; laying and repairing pipe lines. SUBSTANCE: proposed method includes cleaning pipe line from corrosion and applying protective layer by forcing protective composition through its cavity located between elastic separators. Cleaning is performed simultaneously with washing by forcing water through cavity located between separators. After cleaning, grubs are cut by forcing sand-and-cement protective composition between elastic separators. Protective layer is applied by filling with sand-and-cement composition forced through elastic separators and putty knife. Invention contain data on structural sizes of cleaning unit and putty knife. EFFECT: improved quality of coat. 3 dwg
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